|Publication number||US8137389 B2|
|Application number||US 10/181,182|
|Publication date||Mar 20, 2012|
|Filing date||Nov 12, 2001|
|Priority date||Nov 10, 2000|
|Also published as||DE10055891A1, DE50100598D1, EP1246578A2, EP1246578B1, US8968372, US20040015172, US20120265256, US20140081338, US20150320469, WO2002038054A2, WO2002038054A3|
|Publication number||10181182, 181182, PCT/2001/13080, PCT/EP/1/013080, PCT/EP/1/13080, PCT/EP/2001/013080, PCT/EP/2001/13080, PCT/EP1/013080, PCT/EP1/13080, PCT/EP1013080, PCT/EP113080, PCT/EP2001/013080, PCT/EP2001/13080, PCT/EP2001013080, PCT/EP200113080, US 8137389 B2, US 8137389B2, US-B2-8137389, US8137389 B2, US8137389B2|
|Inventors||Lutz Biedermann, Jürgen Harms, Ronald W. Lindsey|
|Original Assignee||Biedermann Motech Gmbh & Co. Kg|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (69), Non-Patent Citations (1), Classifications (15), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This U.S. patent application claims the priority benefit of PCT Patent Application No. EP01/13080 filed Nov. 12, 2001, which claims the priority benefit of German Patent Application No. 100 55 891.7 filed Nov. 10, 2000.
The invention relates to a bone screw with a thread section, a tip on a first end and a head for engaging with a screwdriver at the opposite second end.
From EP-A-0 682 917 a hollow cylindrical pin is known, which has an outer bone thread, beginning at a distance from its tip, and also recesses in its outer casing to enable bone integration. The device is constructed in such a way that screwing in is possible only into a drilled hole, which has to be made beforehand.
From WO 97/37603 a bone screw is known, the shank of which has a plurality of perforations, made by drilling, for growing in.
From U.S. Pat. No. 6,048,343 a bone screw system with a chamfered bone screw is known.
The object of the invention is to improve a bone screw of the kind initially described.
This object is achieved by a bone screw in which the tubular thread section has a bone thread on its outer wall and at least at one end an inner thread section for screwing in the head or tip. This produces great variability, as various heads or tips can be screwed in.
According to a further development the inner thread extends over the entire length of the thread section. In this way the advantage is achieved that the thread section can be shortened in situ to any desired length, so here too variability is increased.
According to another solution the bone screw is characterised in that the tubular thread section has a bone thread on its outer wall and the tip is constructed as a self-cutting tip. This does away with the necessity of first making a bore to accommodate the screw. A further solution is characterised in that the tubular thread section has a bone thread on its outer wall and the head and/or the tip are so dimensioned that they can be inserted to fit snugly into the ends of the thread section. Here again the variability of ways of insertion is increased if the thread section can be shortened in situ to a desired length and then head or tip of the desired kind can be inserted.
Further developments of the invention are characterised in the subordinate claims.
Further features and advantages of the invention emerge from the description of embodiment examples using the figures.
As can best be seen from
On the outer wall a so-called bone thread 4 is provided, which in shape corresponds to the normal bone screws. The bone thread is shown in detail in
The bone screw further comprises a tip 6 attached to one end of the tube. The tip comprises the actual tip part and a shank 7. In the embodiment example shown the shank 7 has a metric outer thread. The tubular thread section 1 has on its inner wall a corresponding metric inner thread and the tip and the tube are rigidly connected to one another by screwing in the tip in the way which can be seen in
The bone screw further comprises a head 8, which, as can best be seen from
The embodiment shown in
In the above-described embodiments the tip and the head are screwed in. The metric inner thread extends in each case over the two ends in such a way that head and tip can be screwed in.
According to a preferred embodiment the inner thread extends over the entire length of the thread section. This has the advantage that the tube can be cut to any length, so screws of desired length can be produced, so storage can be considerably reduced.
According to an alternative embodiment the inner wall of the thread section 1 and the respective shanks 7 and 11 are constructed without the respective threads and defined in their measurements in such a way that tip and head are rigidly connected to fit snugly to the thread section 1.
Alternatively a thread can be provided at one end and the associated element, in other words tip or head, can have a corresponding thread and be able to be screwed in, so at this end cutting the tube to a predetermined length remains possible, and the other element, in other words head or tip, can be attached to fit snugly.
The parts forming the bone screw are preferably made of titanium.
The possibility of screwing in tip and head also creates the advantage that bone material or some other growth-promoting material can be filled into the cavity of the thus formed screw, thus greatly accelerating the healing process.
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|U.S. Classification||606/301, 606/315, 606/306, 606/304|
|International Classification||A61B17/58, A61B17/04, A61B17/16, A61B17/86|
|Cooperative Classification||A61B17/8635, A61B17/863, A61B17/8615, A61B17/869, A61B17/8685, A61B17/864|
|Mar 18, 2003||AS||Assignment|
Owner name: BIEDERMANN MOTECH GMBH, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BIEDERMANN, LUTZ;HARMS, JURGEN;LINDSEY, RONALD W.;REEL/FRAME:013853/0120;SIGNING DATES FROM 20030122 TO 20030124
Owner name: BIEDERMANN MOTECH GMBH, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BIEDERMANN, LUTZ;HARMS, JURGEN;LINDSEY, RONALD W.;SIGNING DATES FROM 20030122 TO 20030124;REEL/FRAME:013853/0120
|Jan 26, 2012||AS||Assignment|
Owner name: BIEDERMANN MOTECH GMBH & CO. KG, GERMANY
Free format text: CHANGE OF LEGAL FORM;ASSIGNOR:BIEDERMANN MOTECH GMBH;REEL/FRAME:027603/0504
Effective date: 20090720
|Mar 16, 2012||AS||Assignment|
Owner name: BIEDERMANN TECHNOLOGIES GMBH & CO. KG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BIEDERMANN MOTECH GMBH & CO. KG;REEL/FRAME:027873/0551
Effective date: 20120308
|Sep 14, 2015||FPAY||Fee payment|
Year of fee payment: 4